Fixed npm warnings in package.json

[PierreFritsch]

• Linked the license file
• Added the repository field
• Removed duplicate 'grunt-contrib-watch'

Made this based on the output of npm install:

npm WARN package.json [email protected] No repository field.
npm WARN package.json [email protected] license should be a valid SPDX license expression
npm WARN package.json Dependency 'grunt-contrib-watch' exists in both dependencies and devDependencies, using '[email protected]' from dependencies
npm WARN deprecated [email protected]: use grunt-ng-annotate instead
npm WARN deprecated [email protected]: Package renamed to phantomjs-prebuilt. Please update 'phantomjs' package references to 'phantomjs-prebuilt'
npm WARN deprecated [email protected]: breaking interface change
npm WARN deprecated [email protected]: Jade has been renamed to pug, please install the latest version of pug instead of jade
npm WARN engine [email protected]: wanted: {"node":"~0.8.0"} (current: {"node":"4.4.3","npm":"2.15.1"})
npm WARN deprecated [email protected]: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
npm WARN deprecated [email protected]: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
npm WARN deprecated [email protected]: Deprecated, use jstransformer
npm WARN deprecated [email protected]: use ng-annotate instead
npm WARN deprecated [email protected]: lodash@<3.0.0 is no longer maintained. Upgrade to lodash@^4.0.0.
npm WARN deprecated [email protected]: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
npm WARN deprecated [email protected]: ReDoS vulnerability parsing Set-Cookie https://nodesecurity.io/advisories/130
npm WARN deprecated [email protected]: graceful-fs v3.0.0 and before will fail on node releases >= v7.0. Please update to graceful-fs@^4.0.0 as soon as possible. Use 'npm ls graceful-fs' to find it in the tree.
npm WARN deprecated [email protected]: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
npm WARN deprecated [email protected]: lodash@<3.0.0 is no longer maintained. Upgrade to lodash@^4.0.0.

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